@Override
public void onCreate() {
super.onCreate();
// get new executor
mExecutor = Executors.newScheduledThreadPool(1);
// create registration with "ping" as endpoint
// if the EID of this device is "dtn://device" then the
// address of this app will be "dtn://device/ping"
Registration registration = new Registration("ping");
// additionally join a group
registration.add(PING_GROUP_EID);
registration.add(STREAM_GROUP1_EID);
// set current stream group
mStreamGroup = STREAM_GROUP1_EID;
try {
// initialize the connection to the DTN service
initialize(registration);
Log.d(TAG, "Connection to DTN service established.");
} catch (ServiceNotAvailableException e) {
// The DTN service has not been found
Log.e(TAG, "DTN service unavailable. Is IBR-DTN installed?", e);
} catch (SecurityException e) {
// The service has not been found
Log.e(
TAG,
"The app has no permission to access the DTN service. It is important to install the DTN service first and then the app.",
e);
}
}
@Override
public void onDestroy() {
if (mDestroySessionOnExit) mSession.destroy();
if (mStreamJob != null) {
mStreamJob.cancel(false);
mStreamJob = null;
try {
mTransmitter.close();
} catch (InterruptedException e) {
Log.d(TAG, "interrupted while closing", e);
} catch (IOException e) {
Log.d(TAG, "error while closing", e);
}
}
// shutdown executor
mExecutor.shutdown();
super.onDestroy();
}